Over 3 years to close an account

I closed my Edgars account on 21/05/2014 due to ********** activity on the account. ( This was successfully resolved). I kept receiving statements, so I made monthly phone calls to the accounts department and was told each time that the account was closed but the statement facility had not been stopped. After more phone calls, I resorted to e-mails and have replies stating that statements have been stopped. I received yet another statement today!! How can I still have credit available if the account is closed? This is also a waste of paper and postage.